Association between disruption of CD4 receptor dimerization and increased human immunodeficiency virus type 1 entry
2006
CD4 Dimerization and HIV-1 Entry
publication
Evidence: moderate
Author Information
Author(s): Rachel Bourgeois, Johanne Mercier, Isabelle Paquette-Brooks, Éric A. Cohen
Primary Institution: Université de Montréal
Hypothesis
Disruption of CD4 dimerization increases HIV-1 entry efficiency.
Conclusion
Monomeric forms of CD4 are preferentially used by HIV-1 to gain entry into target cells.
Supporting Evidence
- Disruption of CD4 dimerization was shown to increase HIV-1 entry efficiency.
- CD4 monomers are used more efficiently by HIV-1 than CD4 dimers.
- Two distinct CD4 dimerization mutants were used to confirm the findings.
Takeaway
This study found that when CD4 receptors don't stick together as dimers, HIV can get into cells more easily.
Methodology
The study used CD4 mutants in A201 cell lines to analyze the role of CD4 dimerization in HIV-1 entry through entry assays based on β-lactamase-Vpr or luciferase reporter activities.
Limitations
The study did not directly demonstrate the dimerization defect of the CD4-E91K, E92K mutant.
Digital Object Identifier (DOI)
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